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melanosis

[ mel-uh-noh-sis ]

noun

, Pathology.
  1. abnormal deposition or development of black or dark pigment in the tissues.
  2. a discoloration caused by this.


melanosis

/ ˌmɛləˈnəʊsɪs; ˌmɛləˈnɒtɪk; ˈmɛləˌnɪzəm /

noun

  1. pathol a skin condition characterized by excessive deposits of melanin
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Derived Forms

  • melanotic, adjective
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Word History and Origins

Origin of melanosis1

First recorded in 1815–25; from New Latin, Late Greek melánōsis “a becoming black”; melan-, -osis
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Example Sentences

But a little melanosis is not necessarily a bad thing.

The melanosis or blackening of insect blood, for instance, is due to the oxidation of a chromogen, the pigment produced being known as a uranidine.

The history of rachitis, of melanosis, and of osteoporosis, as related to an abnormal frangibility of the bones, is a part of our common medical knowledge.

We are in trouble just now, on account of a neglected hereditary melanosis, as Monsieur Trousseau might call it.

It seemed to be physiologically analogous to melanosis.

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melanophoremelanosome